1981224 has 48 divisors (see below), whose sum is σ = 6133920. Its totient is φ = 565920.

The previous prime is 1981201. The next prime is 1981237. The reversal of 1981224 is 4221891.

It is a super-3 number, since 3×1981224³ = 23330389829397622272, which contains 333 as substring.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1462 + ... + 2469.

It is an arithmetic number, because the mean of its divisors is an integer number (127790).

2^1981224 is an apocalyptic number.

1981224 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1981224 is an abundant number, since it is smaller than the sum of its proper divisors (4152696).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1981224 is a wasteful number, since it uses less digits than its factorization.

1981224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3950 (or 3943 counting only the distinct ones).

The product of its digits is 1152, while the sum is 27.

The square root of 1981224 is about 1407.5595902128. The cubic root of 1981224 is about 125.5965934138.

The spelling of 1981224 in words is "one million, nine hundred eighty-one thousand, two hundred twenty-four".